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Biomedical subjects

J Vainio

Publications and source records attributed to J Vainio.

23 records · Page 2Linked to original sources
PubMed1978

A composite resin as an implant material in bone. Histologic, radiologic, microradiologic and oxytetracycline fluorescence examination of rats.

The potential of a bis-GMA composite resin as implant material in bone is evaluated. The material is claimed to have mechanical and physical properties superior to those of the bone cements used today. A groove made in the cortex of the tibia in 18 rats was filled with bis-GMA, while a similar groove was left empty in the contralateral tibia. The reaction of the bone to this material was evaluated by histologic, radiologic, microradiographic and OTC-fluorescence methods. The material was well tolerated by the bone; after 1, 3 and 6 weeks no reaction to the material was observed.

Animals↗
PubMed1978

Non-metallic fixatives in orthopedic surgery. Some aspects of their present and future properties.

Some materials obviously possess bone fixing properties and may hence be used in anchoring prostheses to the bone, in filling bone defects and even in the fixation of fractures. The commercial bone cements are an example of materials already used today, and their development and basic properties are known. Some newer materials, which seem to possess bone fixing properties of a different kind are also, described. The polycarboxylate cements used in dentistry adhere to bone and metals by complex formation. Some hydrophilic materials, which absorb water while setting, have a self-locking capacity. Very strong composite resins can be obtained by mixture of suitable materials. A firm fixation may result from the growth of bone into some porous materials implanted into bone. Biodegradable products disappear from the tissues after some length of time, thus allowing healing to take place by a normal regenerative process. It is concluded that newer and better cementing materials are needed and that such materials may be expected soon to become available.

Acrylic Resins↗
PubMedDate not supplied

Totally absorbable screws in fixation of subtalar extra articular arthrodesis in children with spastic neuromuscular disease: preliminary report of a randomized prospective study of fourteen arthrodeses fixed with absorbable or metallic screws.

Seven patients with spastic neuromuscular disease and severe hindfoot valgus deformity were treated by subtalar arthrodesis. Arthrodesis was performed in both feet at the same operation and fixed on one side with a self-reinforced poly-L-lactide (SR-PLLA) screw, and with a standard AO screw on the other side. The functional status state was improved, and radiographic union of the arthrodesis occurred in all feet. The radiograph showed better solid fusion in five feet treated with PLLA screws, similar fusion in both sides in one patient, and one slower fusion in the side treated initially with a PLLA screw. Totally absorbable SR-PLLA screws appear to be firm enough for fixation of subtalar extraarticular arthrodesis in children.

Adolescent↗